Siemens SIMATIC ET 200C, Manual

Page: 229 / 333

12-3
ET 200C Distributed I/O Station
EWA 4NEB 812 6119-02b
Inputs (Continued)
Measuring principle integrating
voltage-frequency
conversion
Integration/conversion
time/resolution (per channel)
S
parameterizable
S
Integration time in ms
S
Basic conversion time incl.
integration time in ms
Additional conversion
time for resistance-
measurement in ms
or
Additional conversion
time for wire-breakage
monitoring in ms
or
Additional conversion time
for resistance
measurement and wire-
breakage monitoring in ms
yes
2.5
5
1
10
16
16
2
/
3
19
1
10
16
20
22
1
10
16
100
102
1
10
16
S
Resolution in bits + DT
(incl. overload range) 9 12 12 14
S
Interference voltage
suppression for interference
frequency f1 in Hz 400 60 50 10
Permissible potential
differential
S
Input to input max.
"
1 V
S
Inputs to M
A
(U
CM
) max.
"
1 V
S
M
A
to PE or M max. 75 V DC/60 V AC
Error message for
S
Range overshoot yes
S
Wire break on sensor line yes, for Pt 100,
"
80 mV, thermocouples
types N, K, T, U, J, L, E
(parameterizable with
COM ET 200)
Interference voltage suppression
for f = n
(f1
"
1 %), (f1 = interference frequency)
S
Common-mode
interference
(U
pp
t
2.5 V)
> 70 dB
S
Series-mode interference
(peak interference
< nominal value of input
range) > 40 dB
Crosstalk between inputs
S
at 50 Hz 50 dB
S
at 60 Hz 50 dB
Inputs (Continued)
Operational limit (for entire
temperature range, referenced
to input range)
S
80 mV
"
1 %
S
from 250 to 1000 mV
"
0.6 %
S
Thermocouples
"
10 K
S
Resistance
"
5 K
Basic error (operational limit
at 25
_
C, referenced to input
range)
S
80 mV
"
0.6 %
S
from 250 to 1000 mV
"
0.4 %
S
Thermocouples
"
7 K
S
Resistance
"
3 K
Temperature error (referenced
to input range)
"
0.005 %/K
Linearity error (referenced to
input range)
"
0.05 %
Repeat accuracy (in steady
state at 25
_
C, referenced to
input range)
"
0.05 %
Cable length
S
shielded max. 30 m
Analog Modules